Emerson Rosemount 5408 Reference Manual page 108

Service and troubleshooting
February 2020
7.3.1 Incorrect level readings
Table 7-6: Incorrect Level Readings
(1)
Symptom
Reported level is too high or low.
Level is stuck in measuring range.
108
Possible causes
Incorrect tank geometry
configuration.
Time
Incorrect alignment of the
transmitter.
Disturbing objects in the
tank.
Time
Reference Manual
00809-0100-4408
Recommended actions
• Verify the tank geometry parameters
are configured correctly (especially the
Reference Height).
• Run Verify Level to adjust level
measurement, see Verify
• Analyze the echo curve and check
amplitude thresholds, see
thresholds.
• Restore default settings and
reconfigure the device.
• Verify the transmitter head is correctly
aligned, see Align transmitter
• Use the suppress false echoes function
to manage strong disturbance echoes,
see Suppressing false echoes.
• Analyze the echo curve and check
amplitude thresholds, see
thresholds.
• Remove the disturbing object.
• Change alignment of transmitter head
in steps of about 15 degrees, see
transmitter head. After each step,
check if impact of disturbing echoes is
decreased using the echo curve.
• Put an inclined metal plate on top of
the disturbing object.
• Move the transmitter to another
position. Refer to Installation
considerations for installation
considerations.
level.
Amplitude
head.
Amplitude
Align
Reference Manual